(19)
(11) EP 1 753 102 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.02.2007 Bulletin 2007/09

(43) Date of publication A2:
14.02.2007 Bulletin 2007/07

(21) Application number: 06016513.1

(22) Date of filing: 08.08.2006
(51) International Patent Classification (IPC): 
H01S 3/10(2006.01)
H01S 3/106(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK YU

(30) Priority: 08.08.2005 US 706389 P

(71) Applicant: The Regents of the University of Colorado
Boulder, CO 80309-0588 (US)

(72) Inventors:
  • Backus, Sterling J.
    80516 Erie (US)
  • Kapteyn, Henry C.
    80304 Boulder (US)

(74) Representative: Duhme, Torsten et al
Witte, Weller & Partner, Patentanwälte, Postfach 10 54 62
70047 Stuttgart
70047 Stuttgart (DE)

   


(54) Method for optimizing output in ultrashort-pulse multipass laser amplifiers with selective use of a spectral filter


(57) A method for optimizing multipass laser amplifier (100) output (134) utilizes a spectral filter (122) in early passes (128) but not in later passes (126). The pulses shift position slightly for each pass through the amplifier, and the filter is placed such that early passes intersect the filter while later passes bypass it. The filter position may be adjusted offline in order to adjust the number of passes in each category. The filter may be optimized for use in a cryogenic (112) amplifier







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